Feed-water heater.



s. S.,LAWS0N. FEED WATER HEATER. APPLICATION FILED MAR. 7, 19141 Patented Mar. 2, 1915.

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S. S. LAWSON.

FEED WATER HEATER.

APPLICATION FILED MAR. 7, 1914.

Patented Mar. 2, 1915.

2 SHEETS-SHEET 2.

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Beit known' that 1, Sinaai/:AN S. Lawson, a citizen ofthe United States, andl a resi` dent'f Chicago, in the county of Cook and State' of illinois', have invented certain new and useful Improvements in Feed-Water Heaters, of which the following is a specication. g My invention relatesl to feed 'Water heat? ers, particularly to :feedV water heaters for locomotives.. l i c Among the*A important objects of the' in'- ventioh are to rovide'feeld Water heater apparatus whicI can be readilyapplied to boilers' without" requiring reconstruction or lre-arrang'ementin such boilers; to proifideA heating mechanism consisting in greater part of ordinary piping and ttines which can be readily inserted in one of the iiues of' a boiler, to arrange the heating mechanism in such manner that the pipes are readily" accessible from the exterior of theboiler withoutthe necessity of removing any`boiler parts in order that fittings may be readily and quickly cleaned 5. to provide such construction and arrangement that a eat' part of theotherwise Wasted heat"` in the smoke-box of a boiler will be utilized in heating the feed Water; to provide valve mechanism for I preventing draining, ,of 'the heaterI pipes durngseryice of lthe boiler whereby such 'pipes will be prevented from beingv'burned out and will assist in heating 'theboiler water ardgenerating steam; and in 'eneral to provide simple and eflicient Water attachment for boilers, particularly locomotive boilers.

1n the' accompanying drawings which clearl illustrate the features of the inventionl 'igure 1 isa side elevation of a locomotive boiler showing the feed Water attachment a plied thereto, Fig. 2 is a front j elevation o i, the boiler, Fig. 3 is an enlarged sectional view on plane 3 8, Fig. 2 and Fig. d is ,air enlarged sectional view of theY front-end of a modified arrangement.

,eil-though my invention may be applied to dlerent classes of boilers, the drawings show it. appliedv to a locomotive boiler 5 which s the re-box 6 and smoke-box 7` of wel known construction and arrange inent ues 8I extending from the fire-box sube sheet 9 to the smoke box tube Sheet 10 to connect 'the tire-'box with the smoke-boxI from- Which the stach 1l extends. My improved yvater heating mechanism is in the nature of an attachment which can be insorted in one v4of the regular iucs ofthe boiler yor for which a' special Hue may be provided. Each heaterl mechanism is shown as comprising pipes 12 and 13 connected attheir inner ends by a joint tting 14 and terminating at their front ends in a header 15. Theheader is secured to the smoke boxI front 16 at the outside thereof and the pipes will extend entirely across the smoke box and through the receiving flue to. within a short distance ofthe 'relboxv tube sheet. Referring particularly to Fig. 3, the header comprises two preferably cylindrical pas-Y sageways or chambers 17 and 18 registering respectively 1'with the pipes 12 and 13. These chambers communicate respectively with the inletV and outlet laterale 19 angl 20, the inlet 19 being connected by piping 21 with the source of `Water supply, and the outlet 20 beingv connected by piping 22 with the boiler, 'a valve 23 being preferably interposed in this pipe at the boiler. Thus the feed Waterr first passes into chamber 17, thence inwardly through pipe 12 and outwardly lthrough pipevl tochamber 18, and

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rombiere to the boiler. In boilers the heat travels rapidly through the ilues particu-- larly when the exhaust steam is' blown through the stack, the result being that the Water abouti-the lines will have time to absorb only the heat at the outerI part of the flues, the heatpassingV through the more centraly parte of the lues being more or less wasted. However, by applying the feed water heater pipes in a flue, the heat and burning products fiowing'along the more central part of the flue will be absorbed by the feed Water and the feed Water will be rapidly heated Withoutl drawing any of the heat from the Water, in the boiler about the iue. In fact, the feedivater heater pipes will act more or less to baie and retard the flow of burning products .through the' flue in order that the Water. surrounding the ue Will-have 'time to absorb a' greater number of heat units.' A check valve 24 ispre'finjector stops supplying feed water thecheck valve 24 will close and will retain`v los m 1.1, vm

au having an :means CJ lghou El I '1..5

'is' Securafezfending L of vibe in inox W f una A. 1 1T enfin er Wal ,d Smoke W11 au pipa 'ne be `W1th such au 10 cured in combnat mcica oke box m box between, 'the smo op@ pipes ik@ pipes nt 3G lug 35, the m tmick The the Wa meren] Vcured to the smoke box at said 5. In combination with a lire box, smoke box and the flue of a boilen connecting between the fire box tube sheet and the smoke box tube sheet, the smoke box front having headerA an opening opposite said iiue, a Y adapted to be detachably secured to the outside of the smoke box front about said opening, parallel pipes extending from said header. across the smoke box and into said liue and joined at their inner ends, an inlet chamber and header, said chambers communicating re spectively with said pipes and connected re` spectively'with a source of'water supply and With the boiler, and a plugged entrance to each chamber in alinement with the pipe extending therefrom Whereby said pipes may be readily .cleanedl 6. In combination with a ire box, smoke box and the flue of a boiler connecting between the fire box tube sheet and the smoke box tube sheet, the smoke box-front having an opening opposite said iue, a header semain piping loop extending from said header across the smoke box and into said flue, a plurality of auxiliaiypiping loops extending from said header into the smoke box, inlet and outlet for said header adapted for connection respectively with feed water supply and the boiler, and partitions and passageways lin said header for causing serial How of the Water through the loops.

7. In combination'with a fire box, smoke box and the flue of a boiler connecting between the fire box tube sheet and the smoke box tube sheet, the smoke box front having an opening `opposite said fine, a header se- 'an voutlet chamber in said1 cured to the smoke box opening, a'

cured to the smoke box at said opening, a main piping loop extending from said header across the smoke box and into said iiue, a plurality of auxiliary piping loops extending from said header into the smoke box, inlet and outlet for said header adapted for connection respectively with feed Water supply and the boiler, and partitions and passageways in said header for causing serial iiow of the water through the loops, said box tube sheet, the smoke box front having an opening opposite said flue, a header seat said opening, a main piping loop extending from said header across the smoke box plurality oi auxiliary piping loops exteniling from said header into the smoke box,y inlet and outlet for said header adapted for connection'respectively with feed water supand into said flue, al

ply and the boiler, partitions and passage ways in said header for causing serial flow of the water through the loops, said header having a cleaning opening in alinement with each of the' loop legs, and a plug for each cleaning opening. Y

In witness whereof, I hereunto subscribe my name this 4th day of March, A. D., 1914.

lSHIJRNLMI S.' LAWSON. Witnesses:

. CHARLES J. SCHMIDT,

. EDMUND G. INGERsoLL. 

